Java 程序无法接收输入并且程序提前终止

Question

我不确定这个编码是否没有接收到调整变量的输入并且在它完全运行之前被终止

  public class Question {
  int id;
  String name;
  String type;
  double amt;
  public Question(int id, String name, String type, double amt) {
    this.id = id;
    this.name = name;
    this.type = type;
    this.amt = amt;
    }
    public static void main(String[] args)
    {  }
    }


   import java.util.*;
   public class Answer  {
   public static void gettype(Question[] q,String adjust)
   {
     for(int i=0;i<2;i++)
     {
        if(q[i].getType()==adjust)
        {
            System.out.println(q[i].getId());
        }
    }}

    public static void main(String[] args) {
    int id;
    String name,type,adjust;
    double amt;
    Scanner s=new Scanner(System.in);
    Answer a=new Answer();
    System.out.println("enter 2 car inputs");
    Question[] q=new Question[2];
    for(int i=0;i<2;i++)
    {
        id=s.nextInt();
        s.nextLine();
        name=s.nextLine();
        type=s.nextLine();  
        amt=s.nextDouble();
        q[i]= new Question(id,name,type,amt);
    }
    adjust=s.nextLine();
    a.gettype(q,adjust);
    }
     }

在运行代码时，我能够获取汽车对象数组的输入。但之后我无法获取变量调整的值。 所以请在这方面需要帮助。 我试图简单地在构造函数端打印对象。 但无法接收将分配给 var adjust 的第 9 个输入

Answer 1

我觉得这样更好。您应该了解我的工作原理。

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Question {
    private int id;
    private String name;
    private String type;
    private double amt;

    Question(int id, String name, String type, double amt) {
        this.id = id;
        this.name = name;
        this.type = type;
        this.amt = amt;
    }

    int getId() {
        return id;
    }

    String getName() {
        return name;
    }

    String getType() {
        return type;
    }

    double getAmt() {
        return amt;
    }

    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer("Question{");
        sb.append("id=").append(id);
        sb.append(", name='").append(name).append('\'');
        sb.append(", type='").append(type).append('\'');
        sb.append(", amt=").append(amt);
        sb.append('}');
        return sb.toString();
    }
}

class Answer {

    public static final int NUM_QUESTIONS = 2;

    public static void main(String[] args) {
        int numQuestions = (args.length > 0) ? Integer.valueOf(args[0]) : NUM_QUESTIONS;
        List<Question> questions  = new ArrayList<>();
        Scanner s = new Scanner(System.in);
        for (int i = 0; i < numQuestions; ++i) {
            System.out.println(String.format("Question %d", i));
            System.out.print("id: ");
            int id = s.nextInt();
            System.out.print("name: ");
            String name = s.next();
            System.out.print("type: ");
            String type = s.next();
            System.out.print("amt: ");
            double amt = s.nextDouble();
            questions.add(new Question(id, name, type, amt));
        }
        System.out.println(questions);
    }
}